Is it okay to idle the car and turn on the heater without moving?

[MacAlice]

It is not advisable to idle the car and turn on the heater without moving, as it can easily produce carbon monoxide, which is harmful to human health. When the car is in motion, the carbon monoxide generated will decrease or dissipate with the rapid convection of air. However, when idling, even outdoors, if there is no wind, carbon monoxide can accumulate around the car. The longer the duration, the higher the concentration, and a significant amount of carbon monoxide outside the car may be inhaled inside, leading to carbon monoxide poisoning. The car heating system is one of the functions of the car air conditioning system, which serves to provide warmth inside the car, regulate temperature and humidity, and defrost, among others. It can be classified into water-based heating systems, air-based heating systems, independent combustion heating systems, and combined preheating heating systems.